Facile construction of ultrastable alumina anchored palladium catalysts via a designed one pot strategy for enhanced methane oxidation,Catalysis Science & Technology

当前位置： X-MOL 学术 › Catal. Sci. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Facile construction of ultrastable alumina anchored palladium catalysts via a designed one pot strategy for enhanced methane oxidation
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2020-06-19 , DOI: 10.1039/d0cy00727g
Jia Lin _{1,

2,

3,

4} , Xiaohua Chen _{1,

2,

3,

4} , Yong Zheng _{3,

4,

5,

6} , Fei Huang _{1,

2,

3,

4} , Yihong Xiao _{3,

4,

5,

6} , Ying Zheng _{1,

2,

3,

4} , Lilong Jiang _{3,

4,

5,

6}

Affiliation

Improving catalytic activity and stability is imperative for efficient methane oxidation and emission control. Herein, we proposed a designed one pot strategy adopting deoxycholic acid as a template and polyvinylpyrrolidone as a bridging agent to facilely anchor palladium on alumina by building an Al–O–Pd bond. There is no need to introduce foreign elements or perform post-synthetic chemical modifications to the simple-component Pd–Al₂O₃ catalyst. Due to the bonding, highly dispersed palladium particles could be kept from aggregating even during successive heating and cooling ramps of 250–850 °C, as evidenced by the small variation in particle size (1–2 nm). Encouragingly, the constructed catalysts exhibited an excellent catalytic activity with a T₉₉ of 355 °C, along with the significantly enhanced durability in comparison to conventional Pd/Al₂O₃ catalysts under demanding conditions (different reaction temperatures with or without water vapor). The enhancement was primarily associated with the stabilized PdO phase, which derived from the anchored small palladium particles and the consequently promoted oxygen mobility.

中文翻译：

通过设计的一锅法增强甲烷氧化，可轻松构建超稳定的氧化铝锚定钯催化剂

高效的甲烷氧化和排放控制必须提高催化活性和稳定性。在这里，我们提出了一种设计的一锅法，以脱氧胆酸为模板，聚乙烯吡咯烷酮为桥联剂，通过建立Al–O–Pd键，将钯轻松地锚固在氧化铝上。无需对简单组分的Pd–Al ₂ O ₃催化剂引入外来元素或进行合成后的化学修饰。由于这种键合，即使在连续的250-850°C的加热和冷却斜坡期间，也可以防止高度分散的钯颗粒聚集，这可以通过粒径（1-2 nm）的微小变化来证明。令人鼓舞的是，构建的催化剂在T _99的条件下表现出出色的催化活性。与常规Pd / Al ₂ O ₃催化剂相比，在苛刻的条件下（有或没有水蒸气的不同反应温度），其最高温度为355°C，并且耐久性大大提高。增强作用主要与稳定的PdO相有关，PdO相源自固定的小钯颗粒，因此促进了氧的迁移率。

更新日期：2020-07-21

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11